2sin^3x+sinx+2√2(1-cos^2x)=0
2sin^3x+2√2sin^2x+sinx=0
sinx(2sin^2x+2√2sinx+1)=0
sinx=0; x1=pin
2sin^2x+2√2sinx+1=0
D=8-8-0
sinx=-2√2/4=-√2/2; x2=-pi/4+2pik; x3=-3pi/4+2pik; k;n∈Z
2sin^3x+sinx+2√2(1-cos^2x)=0
2sin^3x+2√2sin^2x+sinx=0
sinx(2sin^2x+2√2sinx+1)=0
sinx=0; x1=pin
2sin^2x+2√2sinx+1=0
D=8-8-0
sinx=-2√2/4=-√2/2; x2=-pi/4+2pik; x3=-3pi/4+2pik; k;n∈Z